HP 54540 Series - Page 75

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Chapter 4: Calibrating and Adjusting
To calibrate the firmware
Check that default calibration factors are loaded.
Press Utility ,then press service menu.
If default calibration factors are not loaded ("D's in the table on the screen), load
them.
Select 2. default cal, and press start cal then continue.
Press exit menu then self cal menu. Cal select 0 (0.vertical) should be
selected.
Press channel] to select all, then press start cal and follow the instructions on
the display.
Calibrating individual channels or all
These
calibrations
may
be
done
individually,
but
using
all
(when
available},
and
connecting
all
inputs
at
once
avoids
operator
interaction
between
calibrations.
It
also
shortens
the
total
calibration
time
(see
the
"Calibration
Time"
sidebar
on
the
previous
page).
If the entire calibration procedure fails while running all, run the calibrations individually. [fone
input is !oading the cal signal (an input stuck in 50 Q for example), calibration will fail for all inputs.
Individual calibration will isolate the failure.
After completing vertical cals, press cal select toselectcal select 1 (1.delay).
Press channel to select channel 1, then press start cal and follow the
instructions on the display.
When
the
channel
1
calibration
is
complete,
select
the
other
channels
in
turn
and
follow
the
instructions
on
the
display.
Messages will be displayed as each calibration routine is completed to indicate
calibration has passed or failed.
When the delay cal is complete, press cal select toselect cal select 2 (2.time
null).
Press start cal and follow the instructions on the display.
Channels
2,
3,
and
4
are
calibrated
against
channel
1
As
each
pair
of
channels
completes
calibration,
select
the
next
and
press
continue.
When time null calibration is complete, press cal select toselectcal select 3
(3.logic trigger).
Press start cal and follow the instructions on the display.
Return
to
the
start
of
the
self
cal
menu
(press
cal
select).
Note
that
the
entire
calibration
matrix
is
filled
with
"P,"
and
that
all
tests
have
passed.
After
calibration
has
been
completed,
switch
the
rear-panel
Calibration
switch
to
Protected
(down).
If calibration fails
Go to chapter 5 Troubleshooting.”